Critics maintain that protection software for Windows really puts the brakes on PCs. In a 14-month, extremely comprehensive performance endurance test, AV-TEST examined the trade-off of performance versus protection, and came up with some conclusive answers. For the reader of an endurance test, the provided rating for speed or performance of a product is only expressed in one single aggregate number. For the tester in the laboratory, it's a long journey to arrive at this number. To get there, he had to accompany a solution through 7 test rounds over 14 months. Of the 19,000 individual ratings per product. Norton setup